Low-power-consumption switching power supply controller and power supply

Abstract

The embodiment provides a low-power-consumption switching power supply controller and a power supply. A primary side control module in the power supply controller comprises a primary side control unit, a primary side high-voltage power supply unit, a primary side voltage reference unit, a digital power supply unit and other primary side units; the other primary side units are connected with the primary side control unit through enabling pins; the secondary side control module comprises a secondary side control unit, a secondary side voltage reference unit, a current reference unit, a digital power supply unit and other secondary side units; the other secondary side units are connected with the secondary side control unit through enabling pins; when the system enters a low-power-consumption mode, most units in the primary side control module and the secondary side control module are closed and do not work; even the millimeter wave isolation module is closed; and before the system quits the low-power-consumption mode, all units in the primary side control module and the secondary side control module are controlled to work. Therefore, the standby power consumption of the power supply system can be reduced to be extremely low, and can be lower than 5mw.

Description

Technical Field

[0001] The utility model relates to the technical field of switching power supplies, in particular to a low-power switching power supply controller and a power supply. Background Art

[0002] In the prior art, AC / DC switching power supply mobile phone charger products currently implement the 20mW standby standard. The use of many new technologies has improved the conversion efficiency of charging equipment when it is working, but electronic equipment is more often in a standby state without charging. Although the standby power consumption index alone is not large, due to the long standby time, the total power consumption is still considerable. How to reduce the standby loss is the problem to be solved by this utility model. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a low-power switching power supply controller and a power supply, which can significantly reduce standby power consumption, be more energy-saving and environmentally friendly, and can adapt to more application scenarios.

[0004] In order to solve the above technical problems, the first technical solution adopted by the utility model is:

[0005] A low-power switching power supply controller, comprising: a transformer, a primary side switch, a primary side control module, a secondary side output switch, a secondary side control module and a millimeter wave isolation module;

[0006] The primary side control module is connected to the primary side opposite-name terminal of the transformer via the primary side switch; the secondary side control module is connected to the secondary side same-name terminal of the transformer via the secondary side output switch; the primary side control module is also wirelessly connected to the secondary side control module via the millimeter wave isolation module;

[0007] The primary control module includes a primary control unit, a primary high-voltage power supply unit, a primary voltage reference unit, a digital power supply unit and other primary units; the primary high-voltage power supply unit, the primary voltage reference unit and the digital power supply unit are respectively connected to the primary control unit; the other primary units are connected to the primary control unit via enable pins;

[0008] The secondary side control module includes a secondary side control unit, a secondary side voltage reference unit, a current reference unit, a digital power supply unit and other secondary side units; the secondary side voltage reference unit, the current reference unit and the digital power supply unit are respectively connected to the secondary side control unit; the other secondary side units are connected to the secondary side control unit via an enable pin;

[0009] The primary side control module is used for controlling the other primary side units to shut down by pulling down the enable pin after entering the low power consumption mode;

[0010] The secondary side control module is used for controlling the secondary side units except the other secondary side units to be turned off by pulling down the enable pin after entering the low power consumption mode.

[0011] Optionally, the millimeter wave isolation module includes a millimeter wave transmitting unit and a millimeter wave receiving unit; the millimeter wave transmitting unit is arranged on the secondary side of the transformer; the millimeter wave receiving unit is arranged on the primary side of the transformer;

[0012] The input end of the millimeter wave transmitting unit is connected to the secondary side control unit; the output end of the millimeter wave receiving unit is connected to the primary side control unit; the output end of the millimeter wave transmitting unit is connected to the input end of the millimeter wave receiving unit based on millimeter wave wireless connection;

[0013] The primary side control module is further used to control the millimeter wave receiving unit to be turned off through the primary side control unit after entering the low power consumption mode, and to control the millimeter wave receiving unit to be turned on before exiting the low power consumption mode;

[0014] The secondary side control module is also used to control the millimeter wave transmitting unit to be turned off through the primary side control unit after entering the low power consumption mode, and to control the millimeter wave transmitting unit to be turned on before exiting the low power consumption mode.

[0015] Optionally, it also includes an AC input terminal, an input rectifier bridge, an input filter capacitor, an output filter capacitor and a load output terminal;

[0016] The AC input terminal is connected to the primary terminal of the transformer via the input rectifier bridge and the input filter capacitor in sequence; the secondary side of the transformer is connected to the load output terminal via the output filter capacitor.

[0017] Optionally, the primary switch includes a MOS transistor Q1; the source of the MOS transistor Q1 is grounded, the drain is connected to the primary opposite-name terminal of the transformer, and the gate is connected to the secondary control module.

[0018] Optionally, the secondary side output switch comprises a MOS tube Q2; the source of the MOS tube Q2 is connected to the load output terminal, the drain is connected to the secondary side same-name terminal of the transformer, and the gate is connected to the secondary side control module.

[0019] Optionally, the other primary units include one or more of a primary current reference unit, a millimeter wave signal receiving unit, an error comparator unit, a primary oscillator unit, a primary driver unit, a primary protection unit, a startup failure detection unit, a capacitor discharge unit, a primary test unit and a handshake fault detection unit; the enable pins of the primary current reference unit, the millimeter wave signal receiving unit, the error comparator unit, the primary oscillator unit, the primary driver unit, the primary protection unit, the startup failure detection unit, the capacitor discharge unit, the primary test unit and the handshake fault detection unit are connected to the primary control unit.

[0020] Optionally, the other secondary side units include one or more of a secondary side oscillator unit, a secondary side driver unit, a secondary side protection unit, a constant current and constant voltage control unit, a valley start control unit and a secondary side test unit; the enable pins of the secondary side oscillator unit, the secondary side driver unit, the secondary side protection unit, the constant current and constant voltage control unit, the valley start control unit and the secondary side control unit connected to the secondary side control unit are connected to the secondary side control unit.

[0021] Optionally, both the primary-side control module and the secondary-side control module are integrated chip structures.

[0022] Optionally, the millimeter wave isolation module is a millimeter wave isolation chip.

[0023] The second technical solution adopted by the utility model is:

[0024] A low-power consumption power supply comprises the above-mentioned low-power consumption switching power supply controller.

[0025] The beneficial effects of the utility model are as follows: when the system enters the low power consumption mode, the primary side control module will control all the primary side units except the primary side control unit, the primary side high voltage power supply unit, the primary side voltage reference unit and the digital power supply unit to be turned off and not to work; the secondary side control module will control all the secondary side units except the secondary side control unit, the secondary side voltage reference unit, the current reference unit and the digital power supply unit to be turned off and not to work; even the millimeter wave isolation module is turned off; before the system exits the low power consumption mode, the above-mentioned closed units are controlled to be turned on. In this way, the standby power consumption of the power supply system is reduced to an extremely low level, which can reach less than 5mw. Compared with the standby power consumption of the existing charger system, which is mostly only around 20mw, the utility model can greatly reduce the standby power consumption and meet lower standby standards. It is not only more energy-saving and environmentally friendly, but also can adapt to more application occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a low power switching power supply controller provided by the present utility model Figure 1 ;

[0027] Figure 2 A schematic diagram of the internal structure of a primary side control module provided by an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the internal structure of a secondary side control module provided in an embodiment of the utility model;

[0029] Figure 4 Schematic diagram of the corresponding relationship between the driving signal and the enabling control signal of the primary switch when no-load in the embodiment of the utility model;

[0030] Figure 5 A schematic diagram of a low power switching power supply controller provided by the present utility model Figure 2 .

[0031] Description of labels:

[0032] 10. Transformer; 20. Primary switch; 30. Primary control module; 40. Secondary output switch;

[0033] 50. Secondary side control module; 60. Millimeter wave isolation module;

[0034] 31. Primary control unit; 32. Other primary units;

[0035] 51. Secondary side control unit; 52. Other secondary side units. DETAILED DESCRIPTION

[0036] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0037] Please refer to Figure 1 , Embodiment 1 of the present utility model is:

[0038] This embodiment provides a low power consumption switching power supply controller. Figure 1 As shown, it includes: a transformer 10, a primary switch 20, a primary control module 30, a secondary output switch 40, a secondary control module 50 and a millimeter wave isolation module 60;

[0039] The primary side control module 30 is connected to the primary side opposite-name end of the transformer 10 via the primary side switch 20; the secondary side control module 50 is connected to the secondary side same-name end of the transformer 10 via the secondary side output switch 40; the primary side control module 30 is also wirelessly connected to the secondary side control module 50 via the millimeter wave isolation module 60.

[0040] The working principle of the switching power supply controller of this embodiment is as follows: the AC power input energy gradually increases the inductance current of the primary side of the transformer T1 through the opening of the primary side switch; when the primary side switch is turned off, the energy stored in the primary side of the transformer T1 will be transmitted to the output end, and the output voltage will be stabilized by the secondary side control module. The voltage stabilization process is as follows: the secondary side control module samples the output voltage, and the sampled voltage is compared with a fixed reference voltage. When the sampled voltage is lower than the reference voltage, the secondary side control module will send a pulse to the primary side through the millimeter wave isolation module. After receiving the pulse, the primary side control module will turn on the primary side switch to supplement the energy of the primary side inductance of the transformer T1, and the supplemented energy will be transferred to the secondary side through the transformer T1, thereby playing a role in voltage stabilization; when the sampled voltage is higher than the reference voltage, the secondary side control module will not send a pulse to the primary side control module, and will only send a pulse to the primary side when the sampled voltage is lower than the reference voltage.

[0041] like Figure 1 As shown, the primary control module 30 includes a primary control unit 31, a primary high-voltage power supply unit Charger, a primary voltage reference unit BG1, a digital power supply unit LDO1 and other primary units 32; the primary high-voltage power supply unit Charger, the primary voltage reference unit BG1 and the digital power supply unit LDO1 are respectively connected to the primary control unit 31; in particular, the other primary units 32 are connected to the primary control unit 31 through an enable pin;

[0042] In some specific embodiments, Figure 2 As shown, the other primary units include one or more of a primary current reference unit Iref1, a millimeter wave signal receiving unit F / V, an error comparator unit Comp, a primary oscillator unit Osc1, a primary driver unit Drv1, a primary protection unit Prt1, a start failure detection unit startfail, an X capacitor discharge unit Xdischg, a primary test unit TM / trim and a handshake fault detection unit losscom, depending on the configuration requirements.

[0043] like Figure 1 As shown, the secondary side control module 50 includes a secondary side control unit 51, a secondary side voltage reference unit BG2, a current reference unit Iref2, a digital power supply unit LDO2 and other secondary side units 52; the secondary side voltage reference unit BG2, the current reference unit Iref2 and the digital power supply unit LDO2 are respectively connected to the secondary side control unit 51; in particular, the other secondary side units 52 are connected to the secondary side control unit 51 through an enable pin;

[0044] In some specific embodiments, Figure 3As shown, the other secondary side units include one or more of a secondary side oscillator unit Osc2, a secondary side driver unit Drv2, a secondary side protection unit Prt2, a constant current and constant voltage control unit CC / CV, a valley start control unit DEM and a secondary side test unit TM / trim2, depending on the specific configuration requirements.

[0045] In this embodiment, the primary control module is used to control the other primary units to shut down by pulling down the enable pin after entering the low power consumption mode, that is, to control the other units except the primary high voltage power supply unit, the primary voltage reference unit, and the digital power supply unit to shut down and not work; when exiting the low power consumption mode, the operation of the above-mentioned shutdown units is restored;

[0046] The secondary side control module is used to control the shutdown of other secondary side units except the secondary side units by pulling down the enable pin after entering the low power consumption mode, that is, to control the shutdown of other units except the secondary side voltage reference unit, the current reference unit, and the digital power supply unit; when exiting the low power consumption mode, the operation of the above-mentioned shutdown units is restored.

[0047] In some specific implementations, after entering the low power consumption mode, the millimeter wave isolation module will also be turned off; when exiting the low power consumption mode, the millimeter wave isolation module will be turned on again.

[0048] The low-power switching power supply controller provided in this embodiment, when the power supply system enters the low-power mode (power saving mode), the primary side control module will control all units except the primary high-voltage power supply unit, the primary voltage reference unit and the digital power supply unit to be turned off; the secondary side control module will control all units except the secondary voltage reference unit, the current reference unit and the digital power supply unit to be turned off; even the millimeter wave isolation module will be turned off. Therefore, when the switching power supply system is in low-power mode, most modules are turned off, so that the standby power consumption of the power supply system is reduced to an extremely low level, which can reach less than 5mw. Compared with the standby power consumption of existing charger systems, which is mostly only around 20mw, this embodiment can greatly reduce the standby power consumption and can meet lower standby standards. It is not only more energy-saving and environmentally friendly, but also can adapt to more applications.

[0049] Please refer to Figure 2-Figure 4 , Embodiment 2 of the present utility model is:

[0050] This embodiment is further expanded on the basis of the first embodiment, and specifically further refines the internal structures of the primary-side control module and the secondary-side control module.

[0051] In this embodiment, if Figure 2As shown, the primary control module P1 includes a primary control unit, a primary high-voltage power supply unit Charger, a primary voltage reference unit BG1, a digital power supply unit LDO1 and other primary units;

[0052] Among them, other primary side units specifically include: internal current reference unit Iref1, millimeter wave signal receiving unit F / V, error comparator unit Comp, internal oscillator unit Osc1, driver unit Drv1 for driving primary side switch, primary side protection unit Prt1, start failure detection unit startfail, X capacitor discharge unit Xdischg, primary side test and trim unit TM / trim1 and primary-secondary side handshake fault detection unit losscom.

[0053] In particular, each of the other primary side units is provided with an enable pin GreenB for enabling each unit. When the enable pin GreenB is at a low level, the corresponding unit is turned off and does not work; when the enable pin GreenB is at a high level, the corresponding unit starts working.

[0054] like Figure 3 As shown, the secondary side control module includes a secondary side control unit, a secondary side voltage reference unit BG2, a current reference unit Iref2, a digital power supply unit LDO2 and other secondary side units;

[0055] The secondary side unit specifically includes an internal oscillator unit Osc2, a driver unit Drv2 for driving the secondary side output switch, a secondary side protection unit Prt2, a constant current and constant voltage control unit CC / CV, a valley start control unit DEM, and a secondary side test and trim unit TM / trim2.

[0056] In particular, each of the other secondary side units is provided with an enable pin GreenB for enabling each unit. When the enable pin GreenB is at a low level, the corresponding unit is turned off and does not work; when the enable pin GreenB is at a high level, the corresponding unit starts working.

[0057] In this embodiment, after the power supply system enters the low power consumption mode, the primary control module will control the other primary units (i.e., units other than the primary control unit, the primary high voltage power supply unit Charger, the primary voltage reference unit BG1, and the digital power supply unit LDO1) to shut down and not work by pulling down the enable pin; the secondary control module will also control the other secondary units (i.e., units other than the secondary control unit, the secondary voltage reference unit BG2, the current reference unit Iref2, and the digital power supply unit LDO2) to shut down and work by pulling down the enable pin. When the power supply system exits the low power consumption mode, preferably before exiting, the primary control module and the secondary control module will control the originally shut down units to restart and resume work by pulling up the enable pin.

[0058] In some specific implementations, the signal correspondence between the enable control signal in the primary control module and the secondary control module and the drive signal of the primary switch can be found in Figure 4 .

[0059] like Figure 4 As shown, when no-load, the driving signal G1 of the primary switch is low for a long time. When the driving signal G1 becomes low and after Tpd2 time, the power supply system enters low power consumption mode, that is, power saving mode, and the enable control signal will be pulled low. At this time, Figure 2 The primary side control module and Figure 3 All units except those in the dotted box in the secondary side control module shown will be turned off under the control of the enable control signal; at the same time, the millimeter wave isolation module will also be synchronously controlled to be turned off.

[0060] At the time point Tpd1 before the driving signal G1 changes from low level to high level, the enable control signal starts to be pulled high. Figure 2 The primary side control module and Figure 3 All units in the secondary side control module except those in the dotted box will be turned on by the enable control signal; at the same time, the millimeter wave isolation module will also be controlled to turn on synchronously.

[0061] This goes on and on. Only when the enable control signal is at a high level, all units in the primary side control module and the secondary side control module will work, and the millimeter wave isolation module will also work; when the enable control signal is at a low level, most of the units in the primary side control module and the secondary side control module will not work, and the millimeter wave isolation module will also not work, thereby reducing the standby power consumption of the entire power supply system to an extremely low level, which can reach below 5Mw.

[0062] See also Figure 5 , Embodiment 3 of the present utility model is:

[0063] This embodiment is further expanded on the above-mentioned embodiment 1 or embodiment 2, and specifically further refines the millimeter wave isolation module therein.

[0064] In this embodiment, if Figure 5 As shown, the millimeter wave isolation module includes a millimeter wave transmitting unit and a millimeter wave receiving unit; the millimeter wave transmitting unit is arranged on the secondary side of the transformer; the millimeter wave receiving unit is arranged on the primary side of the transformer;

[0065] The input end of the millimeter wave transmitting unit is connected to the secondary side control unit; the output end of the millimeter wave receiving unit is connected to the primary side control unit; the output end of the millimeter wave transmitting unit is connected to the input end of the millimeter wave receiving unit based on millimeter wave wireless connection;

[0066] The primary side control module is further used to control the millimeter wave receiving unit to be turned off through the primary side control unit after entering the low power consumption mode, and to control the millimeter wave receiving unit to be turned on before exiting the low power consumption mode;

[0067] The secondary side control module is also used to control the millimeter wave transmitting unit to be turned off through the primary side control unit after entering the low power consumption mode, and to control the millimeter wave transmitting unit to be turned on before exiting the low power consumption mode.

[0068] Here, the millimeter wave isolation module is used as the communication module for primary and secondary side isolation transmission in the power supply system. It can not only achieve good isolation effect and optimize communication quality, but also further reduce system power consumption based on its low power consumption characteristics.

[0069] See also Figure 5 , the fourth embodiment of the utility model is:

[0070] This embodiment is further refined based on the above embodiment. Figure 5 As shown, the low-power switching power supply controller provided in this embodiment also includes an AC input terminal, an input rectifier bridge, an input filter capacitor, an output filter capacitor and a load output terminal;

[0071] The AC input terminal is connected to the primary terminal of the transformer T1 via the input rectifier bridge and the input filter capacitor Cin in sequence; the secondary side of the transformer T1 is connected to the load output terminal RL via the output filter capacitor Cout.

[0072] In this embodiment, the primary switch includes a MOS transistor Q1; the source of the MOS transistor Q1 is grounded, the drain is connected to the primary opposite terminal of the transformer, and the gate is connected to the secondary control chip P2.

[0073] Correspondingly, the secondary output switch includes a MOS transistor Q2; the source of the MOS transistor Q2 is connected to the load output terminal, the drain is connected to the secondary same-name terminal of the transformer, and the gate is connected to the secondary control chip P2.

[0074] In this embodiment, the AC power input energy gradually increases the inductor current of the primary side of the transformer T1 by turning on the switch tube Q1; when the primary side inductor energy storage switch tube Q1 is turned off, the energy stored in the primary side of the transformer T1 is transmitted to the output end, and the output voltage is controlled by the secondary side control chip P2 to achieve voltage stabilization. The secondary side control chip P2 samples the output voltage through a voltage divider resistor, and compares the sampled voltage with a fixed reference voltage. When the sampled voltage is lower than the reference voltage, the secondary side control chip P2 will send a pulse to the primary side through the millimeter wave transmitting unit. After receiving the pulse, the primary side control chip P1 will turn on the primary side switch tube Q1 to replenish energy for the primary side inductor. The replenished energy is transmitted to the secondary side through the transformer, thereby achieving a voltage stabilization effect.

[0075] Embodiment 5 of the present utility model is:

[0076] This embodiment is based on the low power consumption switching power supply controller provided by any of the above embodiments, such as Figure 5 As shown, the primary control module and the secondary control module are both integrated chip structures, that is, they can be the preferred configuration of the primary control chip P1 and the secondary control chip P2.

[0077] Correspondingly, the millimeter wave isolation module is also a configuration of a millimeter wave isolation chip.

[0078] In this embodiment, the primary side control module, the secondary side control module and the millimeter wave isolation module all adopt an integrated chip structure, which can greatly reduce the size of the power supply system, is more conducive to the miniaturized configuration of the power supply system, and improves market competitiveness to a certain extent.

[0079] The sixth embodiment of the present utility model is:

[0080] This embodiment is further developed on the basis of any of the above embodiments, and provides a low-power power supply, which includes a low-power switching power supply controller described in any of the above embodiments.

[0081] In this embodiment, the low-power power source is preferably a charger. Compared with the existing charger system, which has a standby power consumption of only about 20mw, the charger provided in this embodiment can significantly reduce the standby power consumption and meet a lower standby standard, which is not only more energy-saving and environmentally friendly, but also adaptable to more application occasions.

[0082] The low-power switching power supply controller and power supply provided in this embodiment, when the system enters the low-power mode, most of the units in the primary control module and the secondary control module are turned off and do not work; even the millimeter wave isolation module is turned off; before the system exits the low-power mode, all units in the primary control module and the secondary control module are controlled to work. In this way, the standby power consumption of the power supply system can be reduced to an extremely low level, which can reach less than 5mw. Compared with the standby power consumption of existing charger systems, which is mostly only around 20mw, the utility model can greatly reduce the standby power consumption and can meet lower standby standards. It is not only more energy-saving and environmentally friendly, but also can adapt to more applications.

[0083] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A low power switching power supply controller, characterized in that: include: Transformer, primary switch, primary control module, secondary output switch, secondary control module and millimeter wave isolation module; The primary side control module is connected to the primary side opposite-name terminal of the transformer via the primary side switch; the secondary side control module is connected to the secondary side same-name terminal of the transformer via the secondary side output switch; the primary side control module is also wirelessly connected to the secondary side control module via the millimeter wave isolation module; The primary control module includes a primary control unit, a primary high-voltage power supply unit, a primary voltage reference unit, a digital power supply unit and other primary units; the primary high-voltage power supply unit, the primary voltage reference unit and the digital power supply unit are respectively connected to the primary control unit; the other primary units are connected to the primary control unit via enable pins; The secondary side control module includes a secondary side control unit, a secondary side voltage reference unit, a current reference unit, a digital power supply unit and other secondary side units; the secondary side voltage reference unit, the current reference unit and the digital power supply unit are respectively connected to the secondary side control unit; the other secondary side units are connected to the secondary side control unit via an enable pin; The primary side control module is used for controlling the other primary side units to shut down by pulling down the enable pin after entering the low power consumption mode; The secondary side control module is used for controlling the secondary side units except the other secondary side units to be turned off by pulling down the enable pin after entering the low power consumption mode.

2. The low power switching power supply controller according to claim 1, characterized in that: The millimeter wave isolation module includes a millimeter wave transmitting unit and a millimeter wave receiving unit; the millimeter wave transmitting unit is arranged on the secondary side of the transformer; the millimeter wave receiving unit is arranged on the primary side of the transformer; The input end of the millimeter wave transmitting unit is connected to the secondary side control unit; the output end of the millimeter wave receiving unit is connected to the primary side control unit; the output end of the millimeter wave transmitting unit is connected to the input end of the millimeter wave receiving unit based on millimeter wave wireless connection; The primary side control module is further used to control the millimeter wave receiving unit to be turned off through the primary side control unit after entering the low power consumption mode, and to control the millimeter wave receiving unit to be turned on before exiting the low power consumption mode; The secondary side control module is also used to control the millimeter wave transmitting unit to be turned off through the primary side control unit after entering the low power consumption mode, and to control the millimeter wave transmitting unit to be turned on before exiting the low power consumption mode.

3. The low power switching power supply controller according to claim 1, characterized in that: It also includes an AC input terminal, an input rectifier bridge, an input filter capacitor, an output filter capacitor, and a load output terminal; The AC input terminal is connected to the primary terminal of the transformer via the input rectifier bridge and the input filter capacitor in sequence; the secondary side of the transformer is connected to the load output terminal via the output filter capacitor.

4. The low power switching power supply controller according to claim 1, characterized in that: The primary switch comprises a MOS tube Q1; the source of the MOS tube Q1 is grounded, the drain is connected to the primary opposite-name terminal of the transformer, and the gate is connected to the secondary control module.

5. The low power switching power supply controller according to claim 1, characterized in that: The secondary output switch comprises a MOS tube Q2; the source of the MOS tube Q2 is connected to the load output terminal, the drain is connected to the secondary same-name terminal of the transformer, and the gate is connected to the secondary control module.

6. The low power switching power supply controller according to claim 1, characterized in that: The other primary units include one or more of a primary current reference unit, a millimeter wave signal receiving unit, an error comparator unit, a primary oscillator unit, a primary driver unit, a primary protection unit, a startup failure detection unit, a capacitor discharge unit, a primary test unit, and a handshake fault detection unit; the enable pins of the primary current reference unit, the millimeter wave signal receiving unit, the error comparator unit, the primary oscillator unit, the primary driver unit, the primary protection unit, the startup failure detection unit, the capacitor discharge unit, the primary test unit, and the handshake fault detection unit are connected to the primary control unit.

7. The low power switching power supply controller according to claim 1, characterized in that: The other secondary side units include one or more of a secondary side oscillator unit, a secondary side driver unit, a secondary side protection unit, a constant current and constant voltage control unit, a valley start control unit and a secondary side control unit; the enable pins of the secondary side oscillator unit, the secondary side driver unit, the secondary side protection unit, the constant current and constant voltage control unit, the valley start control unit and the secondary side test unit connected to the secondary side control unit are connected to the secondary side control unit.

8. The low power switching power supply controller according to claim 1, characterized in that: The primary side control module and the secondary side control module are both integrated chip structures.

9. The low power switching power supply controller according to claim 1, characterized in that: The millimeter wave isolation module is a millimeter wave isolation chip.

10. A low power consumption power supply, characterized in that: A low power switching power supply controller comprising any one of claims 1 to 9.

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